Rocket League is a vehicular soccer video game developed and published by Psyonix. The game was first released for Microsoft Windows and PlayStation 4 in July 2015. Ports for Xbox One, OS X, and Linux were released in 2016, and a port for Nintendo Switch is expected in late 2017. 505 Games began distributing a physical retail version for PlayStation 4 and Xbox One in June 2016. Rocket League's gameplay is largely the same as that of its predecessor Supersonic Acrobatic Rocket-Powered Battle-Cars Rocket League Keys. Players control a rocket-powered car and use it to hit a ball that is much larger than the cars towards the other team's goal area to score goals, in a way that resembles a soccer game, with elements reminiscent of a demolition derby.

Psyonix had previously developed Supersonic Acrobatic Rocket-Powered Battle-Cars in 2008 for the PlayStation 3. That title itself bore out from previous modifications that Psyonix' founder, Dave Hagewood, had done for Unreal Tournament 2003 by expanding out vehicle-based gameplay that Epic Games had already set in place in the engine into a new game mode called Onslaught.For this, Hagewood was hired as a contractor by Epic for Unreal Tournament 2004 specifically for incorporating the Onslaught mode as an official part of the game.Hagewood used his experience at Epic to found Psyonix.